把16个苹果,对分再对分,每份是几个?
16÷2÷2= 4(个)
—How long _____ the meeting _____?
—For about ten minutes. [ ]
A. did; begin
B. has; begun
C. has; been on
D. has; been
用“干燥”表示的干燥方法有()
A.暴晒
B.烘干
C.晒干
D.阴干
E.低温干燥